Perth man found guilty of murdering Helen Marsuk after body found in South Fremantle harbour

A man accused of killing a woman he invited to his house to have sex with him in exchange for drugs has been found guilty of her murder. 

Muhammad Abdur Rehman Mirza, 23, claimed he stabbed Helen Marsuk, 25, in his Gosnells unit in self-defence, after she became enraged that he did not have…